A wooden block on a friction-free track is acted upon by three horizontal forces…
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A wooden block on a friction-free track is acted upon by three horizontal forces along the same straight line: 20N towards the east, 10N towards the west, and 15N towards the east.
(a) Determine the magnitude and direction of the resultant force on the block.
(b) State the direction in which the block will accelerate.
(c) Explain how the Law of Inertia accounts for the subsequent motion of the block if, a little later, all three forces are removed simultaneously.